.circle-flow-app .lab-stage-shell {
  width: min(1960px, calc(100% - 2rem));
}

.circle-flow-layout {
  grid-template-columns: minmax(330px, 370px) minmax(0, 1fr);
}

.circle-flow-app .control-panel {
  position: sticky;
  top: 82px;
  max-height: calc(100vh - 98px);
  overflow-x: hidden;
  overflow-y: auto;
  scrollbar-color: rgba(11, 87, 72, 0.46) transparent;
  scrollbar-width: thin;
}

.control-intro h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 500;
}

.control-intro p {
  margin: 0.55rem 0 1.1rem;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.nowrap {
  white-space: nowrap;
}

.circle-flow-app .control-group legend,
.circle-flow-app .field-label {
  font-size: 0.7rem;
  letter-spacing: 0.035em;
  text-transform: none;
}

.circle-flow-app .control-group select {
  width: 100%;
  min-height: 44px;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--hairline);
  border-radius: 0;
  background: var(--paper);
  color: var(--ink);
}

.circle-flow-app .lab-button {
  min-height: 44px;
}

.field-label-spaced {
  margin-top: 0.85rem;
}

.control-help,
.keyboard-help {
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.5;
}

.control-help {
  margin: 0.65rem 0 0;
}

.keyboard-help {
  margin: 1rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--hairline);
}

.equation-card {
  display: grid;
  gap: 0.42rem;
  margin-top: 0.8rem;
  padding: 0.82rem;
  border: 1px solid rgba(11, 87, 72, 0.22);
  background: #f0eee5;
}

.equation-card > span,
.equation-card > small {
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.64rem;
  letter-spacing: 0.06em;
}

.equation-card > span {
  text-transform: uppercase;
}

.equation-card code {
  overflow-wrap: anywhere;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.06rem;
  line-height: 1.4;
}

.equation-card > small {
  color: var(--muted);
  letter-spacing: 0;
  line-height: 1.45;
}

.parameter-control + .parameter-control {
  margin-top: 0.88rem;
}

.parameter-control[hidden] {
  display: none;
}

.parameter-control .field-label {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem;
  margin-bottom: 0.36rem;
}

.parameter-control .field-label label {
  min-width: 0;
}

.parameter-value-input,
.parameter-value-unit {
  font-family: var(--mono);
  font-size: 0.72rem;
}

.parameter-value-input {
  width: 5.5rem;
  min-height: 1.8rem;
  box-sizing: border-box;
  padding: 0.2rem 0.34rem;
  border: 1px solid rgba(11, 87, 72, 0.24);
  border-radius: 0.35rem;
  background: rgba(255, 253, 247, 0.62);
  color: var(--ink);
  text-align: right;
  transition: border-color 150ms ease, background 150ms ease, box-shadow 150ms ease;
}

.parameter-value-input-integer {
  width: 4.25rem;
}

.parameter-value-input:hover {
  border-color: rgba(11, 87, 72, 0.5);
  background: var(--white);
}

.parameter-value-input:focus-visible {
  border-color: var(--forest);
  outline: none;
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(217, 167, 63, 0.35);
}

.parameter-value-with-unit {
  display: inline-flex;
  align-items: center;
  gap: 0.18rem;
}

.parameter-value-unit {
  white-space: nowrap;
}

.parameter-readout {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 0.42rem;
  margin-left: auto;
}

.parameter-play {
  display: inline-grid;
  width: 1.8rem;
  min-width: 1.8rem;
  height: 1.8rem;
  min-height: 1.8rem;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(11, 87, 72, 0.45);
  border-radius: 50%;
  background: transparent;
  color: var(--forest);
  cursor: pointer;
  font-size: 0.62rem;
  line-height: 1;
}

.parameter-play:hover,
.parameter-play[aria-pressed="true"] {
  background: var(--forest);
  color: var(--white);
}

.parameter-play:focus-visible {
  outline: 3px solid rgba(217, 167, 63, 0.7);
  outline-offset: 2px;
}

.motion-buttons {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.display-controls {
  padding: 0;
}

.display-controls summary {
  min-height: 46px;
  padding: 0.9rem 0;
  color: var(--forest);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.035em;
}

.toggle-label {
  display: flex;
  min-height: 36px;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  font-size: 0.8rem;
}

.toggle-label:last-child {
  padding-bottom: 0.8rem;
}

.toggle-label input {
  width: 17px;
  height: 17px;
  accent-color: var(--forest);
}

.equilibrium-card {
  margin-top: 1rem;
  padding: 0.8rem;
  border: 1px solid rgba(11, 87, 72, 0.22);
  background: #f0eee5;
}

.equilibrium-card-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid rgba(11, 87, 72, 0.18);
}

.equilibrium-card-heading h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1rem;
  font-weight: 500;
}

.equilibrium-card-heading span {
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.68rem;
}

#equilibrium-list {
  display: grid;
  max-height: 152px;
  margin: 0;
  padding: 0;
  overflow-y: auto;
  list-style: none;
}

#equilibrium-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.55rem;
  min-height: 34px;
  border-bottom: 1px solid rgba(11, 87, 72, 0.12);
  font-size: 0.72rem;
}

#equilibrium-list li:last-child {
  border-bottom: 0;
}

#equilibrium-list .equilibrium-empty {
  display: block;
  padding: 0.65rem 0;
  color: var(--muted);
}

.equilibrium-dot {
  width: 10px;
  height: 10px;
  border: 2px solid var(--forest);
  border-radius: 50%;
}

.equilibrium-dot[data-stability="stable"] {
  background: var(--forest);
}

.equilibrium-dot[data-stability="nonhyperbolic"],
.equilibrium-dot[data-stability="neutral"],
.equilibrium-dot[data-stability="semistable"] {
  box-shadow: 0 0 0 2px #f0eee5, 0 0 0 3px var(--forest);
}

.equilibrium-angle {
  font-family: var(--mono);
}

.equilibrium-stability {
  color: var(--muted);
}

.equilibrium-card > p {
  margin: 0.55rem 0 0;
  color: var(--muted);
  font-size: 0.68rem;
  line-height: 1.45;
}

.circle-stage-heading {
  align-items: center;
}

.stage-heading-status {
  display: grid;
  justify-items: end;
  gap: 0.55rem;
}

.stage-heading-status > p {
  margin: 0;
}

.stage-heading-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.7rem;
}

.stage-heading-toolbar > p {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.67rem;
}

.workspace-fullscreen-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.42rem;
  border-color: rgba(11, 87, 72, 0.35);
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.67rem;
  letter-spacing: 0.04em;
  white-space: nowrap;
  text-transform: uppercase;
}

.workspace-fullscreen-toggle[hidden] {
  display: none;
}

.stage-mini-telemetry {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.34rem 0.9rem;
}

.stage-mini-telemetry > span {
  display: inline-flex;
  align-items: baseline;
  gap: 0.28rem;
  white-space: nowrap;
}

.stage-mini-telemetry small {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.61rem;
  letter-spacing: 0.035em;
}

.stage-mini-telemetry strong {
  max-width: 170px;
  overflow: hidden;
  font-family: var(--serif);
  font-size: 0.84rem;
  font-weight: 500;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.circle-workbench {
  position: relative;
  isolation: isolate;
  display: grid;
  min-height: clamp(680px, 72vh, 850px);
  grid-template-columns: minmax(460px, 1.18fr) minmax(350px, 0.82fr);
  grid-template-rows: minmax(330px, 1.08fr) minmax(270px, 0.92fr);
  background: #0b2621;
}

.circle-panel {
  min-width: 0;
  min-height: 0;
  border-bottom: 1px solid rgba(23, 33, 29, 0.16);
}

.portrait-panel {
  grid-row: 1 / 3;
  border-right: 1px solid rgba(235, 247, 243, 0.16);
  background: #09211d;
  color: var(--white);
}

.velocity-panel,
.lift-panel {
  background: #f4f1e7;
}

.bifurcation-panel {
  border-top: 1px solid rgba(23, 33, 29, 0.16);
  background: #f4f1e7;
}

.circle-panel-heading {
  display: flex;
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.05rem;
  border-bottom: 1px solid rgba(23, 33, 29, 0.16);
}

.circle-panel-heading > div {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 0.65rem;
}

.circle-panel-heading > div > span {
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.circle-panel-heading h3 {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 500;
}

.circle-panel-heading p {
  max-width: 185px;
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  line-height: 1.45;
  text-align: right;
}

.circle-panel-heading > .tube-heading-tools {
  display: flex;
  grid-template-columns: none;
  align-items: center;
  justify-content: flex-end;
  gap: 0.55rem;
}

.tube-view-reset {
  min-height: 34px;
  padding: 0.38rem 0.55rem;
  border: 1px solid rgba(11, 87, 72, 0.3);
  border-radius: 3px;
  background: transparent;
  color: var(--forest);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.035em;
  white-space: nowrap;
  text-transform: uppercase;
}

.tube-view-reset:hover,
.tube-view-reset:focus-visible {
  border-color: var(--forest);
  background: rgba(11, 87, 72, 0.08);
}

.tube-view-reset[hidden] {
  display: none;
}

.bifurcation-panel-heading {
  min-height: 64px;
}

.bifurcation-toolbar {
  display: flex;
  min-width: 0;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.72rem 1.05rem;
  border-bottom: 1px solid rgba(23, 33, 29, 0.16);
  background: rgba(11, 87, 72, 0.035);
}

.bifurcation-toolbar label {
  display: grid;
  min-width: 0;
  gap: 0.18rem;
}

.bifurcation-toolbar label strong {
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.045em;
  text-transform: uppercase;
}

.bifurcation-toolbar label small {
  color: var(--muted);
  font-size: 0.7rem;
  line-height: 1.35;
}

.bifurcation-toolbar-input {
  display: flex;
  min-width: min(520px, 62%);
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.bifurcation-toolbar select {
  min-width: min(240px, 34vw);
  max-width: 100%;
  min-height: 44px;
  padding: 0.55rem 2rem 0.55rem 0.7rem;
  border: 1px solid rgba(11, 87, 72, 0.28);
  border-radius: 3px;
  background: #fffdf7;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.74rem;
}

.bifurcation-roll-toggle {
  min-width: 4.8rem;
  min-height: 44px;
  border-color: rgba(11, 87, 72, 0.38);
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

.bifurcation-roll-toggle[aria-pressed="true"] {
  border-color: var(--forest);
  background: var(--forest);
  color: var(--white);
}

.bifurcation-current {
  display: inline-flex;
  min-width: 7.2rem;
  align-items: baseline;
  justify-content: flex-end;
  gap: 0.35rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.65rem;
  white-space: nowrap;
  text-transform: uppercase;
}

.bifurcation-current output {
  color: var(--forest);
  font-family: var(--mono);
  font-size: 0.82rem;
  font-weight: 600;
  text-align: right;
}

.circle-panel-heading-dark {
  border-bottom-color: rgba(235, 247, 243, 0.16);
  background: #0d2b25;
}

.circle-panel-heading-dark > div > span {
  color: #79d8c5;
}

.circle-panel-heading-dark p {
  color: rgba(235, 247, 243, 0.7);
}

.canvas-frame {
  position: relative;
  overflow: hidden;
}

.portrait-frame {
  height: calc(100% - 68px);
  min-height: 600px;
  background:
    radial-gradient(circle at 50% 43%, rgba(44, 107, 95, 0.31), transparent 46%),
    linear-gradient(145deg, #0c3029, #081c25);
}

.velocity-frame,
.lift-frame {
  height: calc(100% - 68px);
  min-height: 240px;
  background: #f4f1e7;
}

.bifurcation-frame {
  width: min(100%, 820px);
  height: auto;
  min-height: 0;
  aspect-ratio: 4 / 3;
  margin-inline: auto;
  border-inline: 1px solid rgba(23, 33, 29, 0.12);
  background: #f4f1e7;
}

.canvas-frame canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  touch-action: pan-y;
}

.canvas-frame canvas[data-dragging="true"] {
  cursor: ew-resize;
}

#lift-canvas,
#bifurcation-canvas[data-view="tube"] {
  cursor: grab;
  touch-action: pan-y;
}

#lift-canvas[data-dragging="rotate"],
#bifurcation-canvas[data-view="tube"][data-dragging="rotate"] {
  cursor: grabbing;
}

#bifurcation-canvas[data-view="plane"],
#bifurcation-canvas[data-dragging="parameter"] {
  cursor: ew-resize;
}

#circle-canvas:focus-visible,
#velocity-canvas:focus-visible,
#lift-canvas:focus-visible,
#bifurcation-canvas:focus-visible {
  z-index: 3;
  outline: 3px solid #f2c969;
  outline-offset: -5px;
}

#velocity-canvas:focus-visible,
#lift-canvas:focus-visible,
#bifurcation-canvas:focus-visible {
  outline-color: var(--forest);
}

.portrait-readout {
  position: absolute;
  z-index: 2;
  top: 0.85rem;
  left: 0.9rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1rem;
  pointer-events: none;
}

.portrait-readout > span {
  display: inline-flex;
  align-items: baseline;
  gap: 0.32rem;
}

.portrait-readout small {
  color: rgba(231, 240, 236, 0.62);
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.portrait-readout strong {
  color: #f7f2e9;
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
}

.portrait-legend,
.velocity-legend {
  position: absolute;
  z-index: 2;
  right: 0.85rem;
  bottom: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.48rem 0.75rem;
  pointer-events: none;
}

.portrait-legend {
  color: rgba(231, 240, 236, 0.78);
}

.velocity-legend {
  color: var(--muted);
}

.portrait-legend span,
.velocity-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.34rem;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.portrait-legend i,
.velocity-legend i {
  display: inline-block;
  width: 9px;
  height: 9px;
  box-sizing: border-box;
  border-radius: 50%;
}

.legend-stable {
  border: 2px solid #a9e4d7;
  background: #a9e4d7;
}

.legend-unstable {
  border: 2px solid #a9e4d7;
  background: transparent;
}

.legend-particle {
  border: 2px solid #f2c969;
  background: #f2c969;
  box-shadow: 0 0 0 2px rgba(242, 201, 105, 0.2);
}

.legend-positive,
.legend-negative {
  border-radius: 1px !important;
}

.legend-positive {
  background: rgba(48, 143, 122, 0.72);
}

.legend-negative {
  background: rgba(193, 105, 71, 0.72);
}

.bifurcation-legend {
  position: absolute;
  z-index: 2;
  top: 0.6rem;
  right: 0.8rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.42rem 0.7rem;
  max-width: calc(100% - 5rem);
  padding: 0.3rem 0.42rem;
  background: rgba(244, 241, 231, 0.88);
  color: var(--muted);
  pointer-events: none;
}

.bifurcation-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  font-family: var(--mono);
  font-size: 0.56rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.bifurcation-legend i {
  position: relative;
  display: inline-block;
  width: 17px;
  height: 8px;
}

.legend-stable-branch::before,
.legend-unstable-branch::before,
.legend-current-parameter::before {
  position: absolute;
  top: 3px;
  right: 0;
  left: 0;
  border-top: 2px solid var(--forest);
  content: "";
}

.legend-unstable-branch::before {
  border-top-color: var(--rust);
  border-top-style: dashed;
}

.legend-current-parameter::before {
  border-top-color: #8a6200;
  border-top-style: dashed;
}

.legend-threshold-branch::before,
.legend-trajectory-point::before {
  position: absolute;
  top: 1px;
  left: 6px;
  width: 5px;
  height: 5px;
  border: 1.5px solid #8a6200;
  border-radius: 50%;
  background: var(--paper);
  content: "";
}

.legend-trajectory-point::before {
  border-color: var(--gold);
  background: var(--gold);
}

.regime-note {
  position: absolute;
  z-index: 3;
  bottom: 0.8rem;
  left: 0.85rem;
  width: min(300px, calc(55% - 1.7rem));
  padding: 0.65rem 0.75rem;
  border: 1px solid rgba(231, 240, 236, 0.2);
  background: rgba(6, 29, 24, 0.82);
  color: rgba(231, 240, 236, 0.78);
  backdrop-filter: blur(8px);
  pointer-events: none;
}

.regime-note > span {
  color: #f2c969;
  font-family: var(--mono);
  font-size: 0.59rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.regime-note p {
  margin: 0.3rem 0 0;
  font-size: 0.7rem;
  line-height: 1.45;
}

.method-notes {
  border: 1px solid var(--hairline);
  border-top: 0;
  background: #ece8dd;
}

.method-notes summary {
  min-height: 44px;
  padding: 0.8rem 1rem;
  color: var(--forest);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.notes-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  padding: 0 1rem 1rem;
}

.notes-grid .app-note {
  margin: 0;
  padding: 0.8rem 0.9rem;
}

@media (max-width: 1360px) {
  .circle-flow-layout {
    grid-template-columns: minmax(300px, 330px) minmax(0, 1fr);
  }

  .circle-workbench {
    grid-template-columns: minmax(410px, 1.1fr) minmax(320px, 0.9fr);
  }

  .stage-mini-telemetry {
    max-width: 500px;
  }
}

@media (max-width: 1180px) {
  .circle-flow-layout {
    grid-template-columns: 1fr;
  }

  .circle-flow-app .control-panel {
    position: static;
    display: grid;
    max-height: none;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 1.15rem;
    overflow: visible;
  }

  .control-intro,
  .equilibrium-card,
  .keyboard-help {
    grid-column: 1 / -1;
  }

  .control-intro {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(260px, 0.8fr);
    align-items: end;
    gap: 1rem;
    padding-bottom: 1rem;
  }

  .control-intro p {
    margin: 0;
  }

  .circle-flow-app .control-group {
    border-top: 1px solid var(--hairline);
  }

  .display-controls {
    padding-top: 0;
  }

  .equilibrium-card {
    margin-top: 0.2rem;
  }

  #equilibrium-list {
    max-height: 100px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 1rem;
  }

  .keyboard-help {
    margin-top: 0.2rem;
  }
}

@media (max-width: 960px) {
  .circle-stage-heading {
    display: grid;
    align-items: start;
  }

  .stage-heading-status {
    justify-items: start;
  }

  .stage-heading-toolbar,
  .stage-mini-telemetry {
    justify-content: flex-start;
  }

  .circle-workbench {
    min-height: 0;
    grid-template-columns: minmax(0, 1fr);
    grid-template-rows: auto;
  }

  .portrait-panel {
    grid-row: auto;
    border-right: 0;
  }

  .portrait-frame {
    height: min(72vw, 650px);
    min-height: 500px;
  }

  .velocity-frame {
    height: 360px;
  }

  .lift-frame {
    height: 285px;
  }

  .regime-note {
    top: 132px;
    right: 0.85rem;
    bottom: auto;
    left: auto;
    width: min(300px, calc(48% - 1.3rem));
  }

  .notes-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .circle-flow-app .lab-stage-shell {
    width: min(100% - 1rem, 1960px);
  }

  .circle-flow-app .control-panel {
    display: block;
  }

  .control-intro {
    display: block;
  }

  .control-intro p {
    margin-top: 0.55rem;
  }

  .circle-stage-heading {
    padding: 1rem;
  }

  .stage-mini-telemetry {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .stage-mini-telemetry > span {
    white-space: normal;
  }

  .circle-panel-heading {
    min-height: 62px;
    padding: 0.75rem;
  }

  .circle-panel-heading h3 {
    font-size: 1.08rem;
  }

  .circle-panel-heading p {
    max-width: 130px;
    font-size: 0.58rem;
  }

  .portrait-frame {
    height: 530px;
    min-height: 0;
  }

  .velocity-frame {
    height: 330px;
  }

  .lift-frame {
    height: 255px;
  }

  .bifurcation-toolbar {
    display: grid;
    gap: 0.65rem;
    padding-inline: 0.75rem;
  }

  .bifurcation-toolbar-input {
    display: grid;
    width: 100%;
    min-width: 0;
    grid-template-columns: minmax(0, 1fr) auto auto;
    gap: 0.45rem;
  }

  .bifurcation-toolbar select {
    width: 100%;
    min-width: 0;
  }

  .bifurcation-current {
    min-width: 0;
  }

  .portrait-legend,
  .velocity-legend {
    left: 0.75rem;
    justify-content: flex-start;
  }

  .regime-note {
    top: 132px;
  }
}

@media (max-width: 480px) {
  .motion-buttons {
    grid-template-columns: 1fr;
  }

  .circle-stage-heading h2 {
    font-size: 1.35rem;
  }

  .stage-heading-toolbar {
    display: grid;
    justify-items: start;
  }

  .circle-panel-heading {
    display: grid;
    gap: 0.2rem;
  }

  .circle-panel-heading p {
    max-width: none;
    text-align: left;
  }

  .bifurcation-panel-heading > .tube-view-reset {
    justify-self: end;
  }

  .bifurcation-toolbar {
    display: grid;
    gap: 0.65rem;
  }

  .bifurcation-toolbar-input {
    display: grid;
    min-width: 0;
    grid-template-columns: 1fr;
    justify-content: stretch;
    gap: 0.45rem;
  }

  .bifurcation-toolbar select {
    width: 100%;
    min-width: 0;
  }

  .bifurcation-current {
    min-width: 0;
    justify-content: flex-start;
  }

  .bifurcation-legend {
    right: 0.4rem;
    left: 3.4rem;
    max-width: none;
  }

  .portrait-frame {
    height: 470px;
  }

  .portrait-readout {
    display: grid;
    gap: 0.18rem;
  }

  .regime-note {
    display: none;
  }

}

@media (forced-colors: active) {
  .parameter-value-input,
  .parameter-play,
  .workspace-fullscreen-toggle,
  .bifurcation-roll-toggle,
  .tube-view-reset,
  .equilibrium-card,
  .equation-card,
  .regime-note {
    border: 1px solid CanvasText;
  }

  .legend-stable,
  .legend-unstable,
  .legend-particle,
  .legend-positive,
  .legend-negative {
    border: 2px solid CanvasText;
    background: Canvas;
  }

  .legend-stable-branch,
  .legend-unstable-branch,
  .legend-threshold-branch,
  .legend-current-parameter,
  .legend-trajectory-point {
    color: CanvasText;
  }

  .legend-stable-branch::before,
  .legend-unstable-branch::before,
  .legend-threshold-branch::before,
  .legend-current-parameter::before,
  .legend-trajectory-point::before {
    border-color: CanvasText;
    background: Canvas;
  }

  .legend-trajectory-point::before {
    background: CanvasText;
  }

  .legend-stable,
  .legend-particle {
    background: CanvasText;
  }

  #circle-canvas,
  #velocity-canvas,
  #lift-canvas,
  #bifurcation-canvas {
    border: 2px solid CanvasText;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

#circle-flow-workspace:fullscreen,
#circle-flow-workspace.is-fullscreen {
  position: fixed;
  z-index: 1000;
  inset: 0;
  display: grid;
  width: 100vw;
  height: 100dvh;
  max-width: none;
  grid-template-columns: minmax(300px, 350px) minmax(0, 1fr);
  align-items: stretch;
  gap: 0;
  margin: 0;
  overflow: hidden;
  background: var(--paper);
}

#circle-flow-workspace:fullscreen::backdrop {
  background: var(--paper);
}

#circle-flow-workspace:fullscreen .control-panel,
#circle-flow-workspace.is-fullscreen .control-panel {
  position: static;
  display: block;
  height: 100dvh;
  max-height: none;
  padding: 1rem;
  overflow-x: hidden;
  overflow-y: auto;
  border-width: 0 1px 0 0;
}

#circle-flow-workspace:fullscreen .stage-stack,
#circle-flow-workspace.is-fullscreen .stage-stack {
  display: block;
  min-width: 0;
  min-height: 0;
  height: 100dvh;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
}

#circle-flow-workspace:fullscreen .stage-panel,
#circle-flow-workspace.is-fullscreen .stage-panel {
  display: grid;
  height: auto;
  min-height: 100dvh;
  grid-template-rows: auto minmax(460px, 58vh) auto;
  border: 0;
}

#circle-flow-workspace:fullscreen .circle-stage-heading,
#circle-flow-workspace.is-fullscreen .circle-stage-heading {
  min-height: 98px;
  padding: 0.8rem 1rem;
}

#circle-flow-workspace:fullscreen .circle-workbench,
#circle-flow-workspace.is-fullscreen .circle-workbench {
  min-height: 0;
  height: 100%;
  grid-template-rows: repeat(2, minmax(0, 1fr));
}

#circle-flow-workspace:fullscreen .bifurcation-panel,
#circle-flow-workspace.is-fullscreen .bifurcation-panel {
  display: block;
  min-height: 0;
}

#circle-flow-workspace:fullscreen .bifurcation-frame,
#circle-flow-workspace.is-fullscreen .bifurcation-frame {
  width: min(100%, 820px);
  height: auto;
  min-height: 0;
  aspect-ratio: 4 / 3;
}

#circle-flow-workspace:fullscreen .portrait-frame,
#circle-flow-workspace.is-fullscreen .portrait-frame,
#circle-flow-workspace:fullscreen .velocity-frame,
#circle-flow-workspace.is-fullscreen .velocity-frame,
#circle-flow-workspace:fullscreen .lift-frame,
#circle-flow-workspace.is-fullscreen .lift-frame {
  min-height: 0;
}

#circle-flow-workspace:fullscreen .method-notes,
#circle-flow-workspace.is-fullscreen .method-notes {
  display: none;
}

@media (max-width: 1040px) {
  #circle-flow-workspace:fullscreen,
  #circle-flow-workspace.is-fullscreen {
    grid-template-columns: minmax(270px, 310px) minmax(0, 1fr);
  }

  #circle-flow-workspace:fullscreen .circle-workbench,
  #circle-flow-workspace.is-fullscreen .circle-workbench {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.85fr);
  }

  #circle-flow-workspace:fullscreen .stage-mini-telemetry,
  #circle-flow-workspace.is-fullscreen .stage-mini-telemetry {
    display: none;
  }
}

@media (min-width: 940px) and (max-height: 720px) {
  #circle-flow-workspace:fullscreen .stage-stack,
  #circle-flow-workspace.is-fullscreen .stage-stack {
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  #circle-flow-workspace:fullscreen .stage-panel,
  #circle-flow-workspace.is-fullscreen .stage-panel {
    height: auto;
    grid-template-rows: auto 500px auto;
  }
}

@media (max-width: 939px) {
  #circle-flow-workspace:fullscreen,
  #circle-flow-workspace.is-fullscreen {
    grid-template-columns: minmax(245px, 280px) minmax(0, 1fr);
  }

  #circle-flow-workspace:fullscreen .stage-stack,
  #circle-flow-workspace.is-fullscreen .stage-stack {
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  #circle-flow-workspace:fullscreen .stage-panel,
  #circle-flow-workspace.is-fullscreen .stage-panel {
    display: block;
    height: auto;
  }

  #circle-flow-workspace:fullscreen .circle-workbench,
  #circle-flow-workspace.is-fullscreen .circle-workbench {
    height: auto;
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  #circle-flow-workspace:fullscreen .portrait-panel,
  #circle-flow-workspace.is-fullscreen .portrait-panel {
    grid-row: auto;
    border-right: 0;
  }

  #circle-flow-workspace:fullscreen .portrait-frame,
  #circle-flow-workspace.is-fullscreen .portrait-frame {
    height: 500px;
  }

  #circle-flow-workspace:fullscreen .velocity-frame,
  #circle-flow-workspace.is-fullscreen .velocity-frame {
    height: 330px;
  }

  #circle-flow-workspace:fullscreen .lift-frame,
  #circle-flow-workspace.is-fullscreen .lift-frame {
    height: 270px;
  }

  #circle-flow-workspace:fullscreen .bifurcation-frame,
  #circle-flow-workspace.is-fullscreen .bifurcation-frame {
    width: min(100%, 720px);
    height: auto;
    aspect-ratio: 4 / 3;
  }
}

@media (max-width: 719px) {
  #circle-flow-workspace:fullscreen,
  #circle-flow-workspace.is-fullscreen {
    display: block;
    overflow-y: auto;
  }

  #circle-flow-workspace:fullscreen .control-panel,
  #circle-flow-workspace.is-fullscreen .control-panel,
  #circle-flow-workspace:fullscreen .stage-stack,
  #circle-flow-workspace.is-fullscreen .stage-stack {
    height: auto;
    overflow: visible;
  }

  #circle-flow-workspace:fullscreen .stage-panel,
  #circle-flow-workspace.is-fullscreen .stage-panel {
    display: block;
    height: auto;
  }

  #circle-flow-workspace:fullscreen .circle-workbench,
  #circle-flow-workspace.is-fullscreen .circle-workbench {
    display: block;
    height: auto;
  }
}

/* On a desktop teaching display, use the second dimension of the screen:
   the three linked motion views and the bifurcation view sit side by side.
   The control column may still scroll for parameter-heavy workshop families,
   but the visualization stage itself always fits in the fullscreen viewport. */
@media (min-width: 1180px) and (min-height: 700px) {
  #circle-flow-workspace:fullscreen,
  #circle-flow-workspace.is-fullscreen {
    grid-template-columns: clamp(290px, 22vw, 320px) minmax(0, 1fr);
  }

  #circle-flow-workspace:fullscreen .control-panel,
  #circle-flow-workspace.is-fullscreen .control-panel {
    padding: 0.75rem;
    scrollbar-gutter: stable;
  }

  #circle-flow-workspace:fullscreen .control-intro h2,
  #circle-flow-workspace.is-fullscreen .control-intro h2 {
    font-size: 1.35rem;
  }

  #circle-flow-workspace:fullscreen .control-intro,
  #circle-flow-workspace.is-fullscreen .control-intro {
    display: block;
    padding-bottom: 0;
  }

  #circle-flow-workspace:fullscreen .control-intro p,
  #circle-flow-workspace.is-fullscreen .control-intro p {
    margin: 0.35rem 0 0.7rem;
    font-size: 0.76rem;
  }

  #circle-flow-workspace:fullscreen .control-group,
  #circle-flow-workspace.is-fullscreen .control-group {
    padding-block: 0.7rem;
  }

  #circle-flow-workspace:fullscreen .equation-card,
  #circle-flow-workspace.is-fullscreen .equation-card {
    margin-top: 0.5rem;
    padding: 0.6rem;
  }

  #circle-flow-workspace:fullscreen .parameter-control + .parameter-control,
  #circle-flow-workspace.is-fullscreen .parameter-control + .parameter-control {
    margin-top: 0.55rem;
  }

  #circle-flow-workspace:fullscreen .equilibrium-card,
  #circle-flow-workspace.is-fullscreen .equilibrium-card {
    margin-top: 0.65rem;
    padding: 0.6rem;
  }

  #circle-flow-workspace:fullscreen #equilibrium-list,
  #circle-flow-workspace.is-fullscreen #equilibrium-list {
    max-height: 102px;
    grid-template-columns: 1fr;
    gap: 0;
  }

  #circle-flow-workspace:fullscreen .keyboard-help,
  #circle-flow-workspace.is-fullscreen .keyboard-help {
    display: none;
  }

  #circle-flow-workspace:fullscreen .stage-stack,
  #circle-flow-workspace.is-fullscreen .stage-stack {
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
  }

  #circle-flow-workspace:fullscreen .stage-panel,
  #circle-flow-workspace.is-fullscreen .stage-panel {
    display: grid;
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 0;
    grid-template-columns: minmax(0, 1.25fr) minmax(400px, 1fr);
    grid-template-rows: auto minmax(0, 1fr);
    overflow: hidden;
  }

  #circle-flow-workspace:fullscreen .circle-stage-heading,
  #circle-flow-workspace.is-fullscreen .circle-stage-heading {
    grid-row: 1;
    grid-column: 1 / -1;
    min-height: 80px;
    padding: 0.65rem 0.85rem;
  }

  #circle-flow-workspace:fullscreen .circle-stage-heading h2,
  #circle-flow-workspace.is-fullscreen .circle-stage-heading h2 {
    font-size: 1.35rem;
  }

  #circle-flow-workspace:fullscreen .circle-workbench,
  #circle-flow-workspace.is-fullscreen .circle-workbench {
    grid-row: 2;
    grid-column: 1;
    width: 100%;
    height: 100%;
    min-height: 0;
    grid-template-columns: minmax(0, 1.18fr) minmax(220px, 0.82fr);
    grid-template-rows: repeat(2, minmax(0, 1fr));
  }

  #circle-flow-workspace:fullscreen .circle-workbench .circle-panel-heading,
  #circle-flow-workspace.is-fullscreen .circle-workbench .circle-panel-heading,
  #circle-flow-workspace:fullscreen .bifurcation-panel-heading,
  #circle-flow-workspace.is-fullscreen .bifurcation-panel-heading {
    min-height: 52px;
    padding: 0.55rem 0.7rem;
  }

  #circle-flow-workspace:fullscreen .circle-workbench .circle-panel-heading h3,
  #circle-flow-workspace.is-fullscreen .circle-workbench .circle-panel-heading h3,
  #circle-flow-workspace:fullscreen .bifurcation-panel-heading h3,
  #circle-flow-workspace.is-fullscreen .bifurcation-panel-heading h3 {
    font-size: 1.02rem;
  }

  #circle-flow-workspace:fullscreen .circle-workbench .circle-panel-heading p,
  #circle-flow-workspace.is-fullscreen .circle-workbench .circle-panel-heading p {
    display: none;
  }

  #circle-flow-workspace:fullscreen .circle-workbench .circle-panel-heading > div:first-child > span,
  #circle-flow-workspace.is-fullscreen .circle-workbench .circle-panel-heading > div:first-child > span {
    display: none;
  }

  #circle-flow-workspace:fullscreen .portrait-frame,
  #circle-flow-workspace.is-fullscreen .portrait-frame,
  #circle-flow-workspace:fullscreen .velocity-frame,
  #circle-flow-workspace.is-fullscreen .velocity-frame,
  #circle-flow-workspace:fullscreen .lift-frame,
  #circle-flow-workspace.is-fullscreen .lift-frame {
    height: calc(100% - 52px);
    min-height: 0;
  }

  #circle-flow-workspace:fullscreen .bifurcation-panel,
  #circle-flow-workspace.is-fullscreen .bifurcation-panel {
    display: grid;
    grid-row: 2;
    grid-column: 2;
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    grid-template-rows: auto auto minmax(0, 1fr);
    overflow: hidden;
    border-top: 0;
    border-left: 1px solid rgba(23, 33, 29, 0.16);
  }

  #circle-flow-workspace:fullscreen .bifurcation-toolbar,
  #circle-flow-workspace.is-fullscreen .bifurcation-toolbar {
    display: grid;
    gap: 0.45rem;
    padding: 0.5rem 0.7rem;
  }

  #circle-flow-workspace:fullscreen .bifurcation-toolbar label small,
  #circle-flow-workspace.is-fullscreen .bifurcation-toolbar label small {
    display: none;
  }

  #circle-flow-workspace:fullscreen .bifurcation-toolbar-input,
  #circle-flow-workspace.is-fullscreen .bifurcation-toolbar-input {
    display: grid;
    width: 100%;
    min-width: 0;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.45rem;
  }

  #circle-flow-workspace:fullscreen .bifurcation-toolbar select,
  #circle-flow-workspace.is-fullscreen .bifurcation-toolbar select {
    width: 100%;
    min-width: 0;
    min-height: 38px;
    padding-block: 0.4rem;
  }

  #circle-flow-workspace:fullscreen .bifurcation-roll-toggle,
  #circle-flow-workspace.is-fullscreen .bifurcation-roll-toggle {
    min-width: 4.25rem;
    min-height: 38px;
    padding: 0.4rem 0.55rem;
  }

  #circle-flow-workspace:fullscreen .bifurcation-current,
  #circle-flow-workspace.is-fullscreen .bifurcation-current {
    min-width: 0;
    grid-column: 1 / -1;
    justify-content: flex-end;
  }

  #circle-flow-workspace:fullscreen .bifurcation-frame,
  #circle-flow-workspace.is-fullscreen .bifurcation-frame {
    width: min(100%, 820px, calc(133.333vh - 340px));
    width: min(100%, 820px, calc(133.333dvh - 340px));
    height: auto;
    min-height: 0;
    align-self: center;
    justify-self: center;
    aspect-ratio: 4 / 3;
  }

  #circle-flow-workspace:fullscreen .regime-note,
  #circle-flow-workspace.is-fullscreen .regime-note {
    width: min(260px, calc(58% - 1.3rem));
    padding: 0.5rem 0.6rem;
  }
}